Question

If 0.004 moles of water is used as liquid for the thermometer, calculate the mass of water. [3 marks]

Answer 1

Answer:

0.13202696 grams (or rounded; 0.13 grams)

Explanation:

0.004 moles-

1 mole of H2O is the sum of the atomic mass of Hydrogen and atomic mass of 2 Oxygen.

1.00794+(2 x 15.9994) = 33.00674

However we are not solving for 1 mole, but for 0.004 moles. So multiply the amount for one mole by 0.004 to get 0.13 grams (mass of 0.004 moles of H2O)